Agronomy Final Written Exam | Questions & Answers (100 %Score) Latest Updated
2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions
Who is given credit for discovering that soybeans were an excellent source of protein
and oil and for encouraging farmers to rotate their crops with soybeans? - George
Washington Carver
What term is used to describe fine brown or gray hairs on the leaves, stems, and pods
of
soybeans? - pubescence
Which of the following is a true statement regarding soybeans? - Soybeans are
generally considered a source of complete protein.
The top 2 states in terms of soybean production? - Iowa and Illinois
A (n) _________ is a plant that can fix nitrogen from the air in the soil - legume
Living organisms that cause disease are often referred to as ______. - pathogens
Which of the following is a benefit of integrated pest management? - reduced pesticide
costs
Economic injury level is _____. - the point at which the cost of pest control equals the
revenue loss caused by a
pest
Which method of pest control involves making the crop environment unsuitable for pests
to feed,
live, or reproduce? - cultural
What are used to kill unwanted plants? - herbicides
What is caused by environmental imbalances and cannot be spread to other plants? -
noninfectious disease
What are the three components of the disease triangle? - a susceptible host, a causal
agent, and environmental conditions
What are the principle causes of most diseases that affect agricultural crops? - Fungi
Which of the following is a cultural/physical method used to manage pest populations? -
removing and destroying infected plants
, What is a pathogen? - a living, disease-producing agent
Optimum care of plants through irrigation and fertilization reduce weed, disease, and
insect problems. Which type of disease control measure do these represent? - cultural
Use of beneficial predatory insects is an example of which type of pest control? -
biological
Why is the implementation of an IPM program beneficial to the environment? - There is
reduced contamination and degradation of soil and water.
A grower notices that a crop displays yellow streaking and stunted growth and identifies
the problem as virus-related. How would this type of disturbance be classified? -
infectious diseaseinfectious disease
What is a tiny, hair-like roundworm that feeds on the roots of plants? - nematode
What is a main objective of cultural control of plant pests? - maintaining healthy plants
by providing optimal growing conditions
What is the first step in choosing an insecticide for pest control? - properly identify the
pest
What is a nonselective herbicide? - one that will kill any plant with which it comes in
contact
__________________ are absorbed by the roots or other plant parts and moved
throughout the plant by vascular tissues - Translocated herbicides
Dicot plant weeds including dandelions, ground ivy, plantain, and spurge are called
__________. - broadleaf weeds
What describes biological weed control? - control uses insects, diseases, predators, or
other plants that are harmful to weeds without causing damage to crops
What type of weed is injurious to crops, people, or livestock? - noxious
What type of pesticide is used to kill unwanted plants? - herbicides
A farmer wants to eliminate ragweed and pigweed that are competing with corn in a
field. What type of herbicide should she use? - a selective herbicide
What classification of herbicides is applied before the weeds and/or crop emerges, but
after the crop has been seeded? - preemergent herbicides
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